There's a heavyweight line-up of speakers. Standing for the motion are Lord Lamont; Neil O'Brien, the director of Open Europe; and the award-winning historian Andrew Roberts. They'll be opposed by Denis MacShane MP; Vernon Bogdanor, Professor of Government at Oxford University; and David Aaronovitch, the broadcaster and journalist. The debate will be chaired by Andrew Neil.

The Spectator website will feature live audio of the debate, and exclusive commentary from Lloyd Evans.